I think Mitchell outlined his vision for libghostty pretty well here: https://mitchellh.com/writing/libghostty-is-coming

Alacritty is already pretty performant (relative to a lot of the other terminal emulators), but my read is Ghostty has been going hard over performance/standards/protocols (like Kitty).

The maintainer doesn’t have bad temper.

One would be support for ligatures